134 lines · c
1// SPDX-License-Identifier: GPL-2.02#define _GNU_SOURCE3#include <sched.h>4 5#include <sys/timerfd.h>6#include <sys/syscall.h>7#include <sys/types.h>8#include <sys/wait.h>9#include <time.h>10#include <unistd.h>11#include <stdlib.h>12#include <stdio.h>13#include <stdint.h>14 15#include "log.h"16#include "timens.h"17 18static int tclock_gettime(clock_t clockid, struct timespec *now)19{20 if (clockid == CLOCK_BOOTTIME_ALARM)21 clockid = CLOCK_BOOTTIME;22 return clock_gettime(clockid, now);23}24 25int run_test(int clockid, struct timespec now)26{27 struct itimerspec new_value;28 long long elapsed;29 int fd, i;30 31 if (check_skip(clockid))32 return 0;33 34 if (tclock_gettime(clockid, &now))35 return pr_perror("clock_gettime(%d)", clockid);36 37 for (i = 0; i < 2; i++) {38 int flags = 0;39 40 new_value.it_value.tv_sec = 3600;41 new_value.it_value.tv_nsec = 0;42 new_value.it_interval.tv_sec = 1;43 new_value.it_interval.tv_nsec = 0;44 45 if (i == 1) {46 new_value.it_value.tv_sec += now.tv_sec;47 new_value.it_value.tv_nsec += now.tv_nsec;48 }49 50 fd = timerfd_create(clockid, 0);51 if (fd == -1)52 return pr_perror("timerfd_create(%d)", clockid);53 54 if (i == 1)55 flags |= TFD_TIMER_ABSTIME;56 57 if (timerfd_settime(fd, flags, &new_value, NULL))58 return pr_perror("timerfd_settime(%d)", clockid);59 60 if (timerfd_gettime(fd, &new_value))61 return pr_perror("timerfd_gettime(%d)", clockid);62 63 elapsed = new_value.it_value.tv_sec;64 if (llabs(elapsed - 3600) > 60) {65 ksft_test_result_fail("clockid: %d elapsed: %lld\n",66 clockid, elapsed);67 return 1;68 }69 70 close(fd);71 }72 73 ksft_test_result_pass("clockid=%d\n", clockid);74 75 return 0;76}77 78int main(int argc, char *argv[])79{80 int ret, status, len, fd;81 char buf[4096];82 pid_t pid;83 struct timespec btime_now, mtime_now;84 85 nscheck();86 87 check_supported_timers();88 89 ksft_set_plan(3);90 91 clock_gettime(CLOCK_MONOTONIC, &mtime_now);92 clock_gettime(CLOCK_BOOTTIME, &btime_now);93 94 if (unshare_timens())95 return 1;96 97 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",98 CLOCK_MONOTONIC, 70 * 24 * 3600,99 CLOCK_BOOTTIME, 9 * 24 * 3600);100 fd = open("/proc/self/timens_offsets", O_WRONLY);101 if (fd < 0)102 return pr_perror("/proc/self/timens_offsets");103 104 if (write(fd, buf, len) != len)105 return pr_perror("/proc/self/timens_offsets");106 107 close(fd);108 mtime_now.tv_sec += 70 * 24 * 3600;109 btime_now.tv_sec += 9 * 24 * 3600;110 111 pid = fork();112 if (pid < 0)113 return pr_perror("Unable to fork");114 if (pid == 0) {115 ret = 0;116 ret |= run_test(CLOCK_BOOTTIME, btime_now);117 ret |= run_test(CLOCK_MONOTONIC, mtime_now);118 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);119 120 if (ret)121 ksft_exit_fail();122 ksft_exit_pass();123 return ret;124 }125 126 if (waitpid(pid, &status, 0) != pid)127 return pr_perror("Unable to wait the child process");128 129 if (WIFEXITED(status))130 return WEXITSTATUS(status);131 132 return 1;133}134